Aminerals__ is the appearance of its powder after the mineral has been dragged across a porcelain plate a) color b) luster c)streak d) contrast

Which beat describes the brain stem

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

How do ratio scale and diagrammatic scale work